Arch Villain

The Arch Villain appears in the episodes "The Arch Villain Problem/The Straight and Narrow Problem"

In the first episode, the Arch Villain wreaks havoc on the city of Mathtropolis (London, United Kingdom & Sydney, Australia) by turning everything into arches, Super Peg and Cat Guy come to the rescue. In the second episode, Super Peg and Cat Guy trail the Arch Villain, who has given up his arch ways and gone on a rampage with straight and narrow shapes instead.